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222 lines
16 KiB
C++
222 lines
16 KiB
C++
/*
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* Copyright (C) 2011 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <gtest/gtest.h>
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#include "flutter/sky/engine/wtf/CheckedArithmetic.h"
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namespace {
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#define CheckedArithmeticTest(type, coerceLiteral, MixedSignednessTest) \
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TEST(WTF, Checked_##type) { \
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Checked<type, RecordOverflow> value; \
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EXPECT_EQ(coerceLiteral(0), value.unsafeGet()); \
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EXPECT_EQ(std::numeric_limits<type>::max(), \
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(value + std::numeric_limits<type>::max()).unsafeGet()); \
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EXPECT_EQ(std::numeric_limits<type>::max(), \
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(std::numeric_limits<type>::max() + value).unsafeGet()); \
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EXPECT_EQ(std::numeric_limits<type>::min(), \
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(value + std::numeric_limits<type>::min()).unsafeGet()); \
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EXPECT_EQ(std::numeric_limits<type>::min(), \
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(std::numeric_limits<type>::min() + value).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (value * coerceLiteral(0)).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (coerceLiteral(0) * value).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (value * value).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (value - coerceLiteral(0)).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (coerceLiteral(0) - value).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (value - value).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (value++).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(1), (value--).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(1), (++value).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (--value).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(10), (value += coerceLiteral(10)).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(10), value.unsafeGet()); \
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EXPECT_EQ(coerceLiteral(100), (value *= coerceLiteral(10)).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(100), value.unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (value -= coerceLiteral(100)).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), value.unsafeGet()); \
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value = 10; \
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EXPECT_EQ(coerceLiteral(10), value.unsafeGet()); \
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EXPECT_EQ(coerceLiteral(0), (value - coerceLiteral(10)).unsafeGet()); \
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EXPECT_EQ(coerceLiteral(10), value.unsafeGet()); \
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value = std::numeric_limits<type>::min(); \
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EXPECT_EQ(true, (Checked<type, RecordOverflow>(value - coerceLiteral(1))) \
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.hasOverflowed()); \
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EXPECT_EQ(true, !((value--).hasOverflowed())); \
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EXPECT_EQ(true, value.hasOverflowed()); \
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value = std::numeric_limits<type>::max(); \
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EXPECT_EQ(true, !value.hasOverflowed()); \
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EXPECT_EQ(true, (Checked<type, RecordOverflow>(value + coerceLiteral(1))) \
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.hasOverflowed()); \
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EXPECT_EQ(true, !(value++).hasOverflowed()); \
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EXPECT_EQ(true, value.hasOverflowed()); \
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value = std::numeric_limits<type>::max(); \
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EXPECT_EQ(true, (value += coerceLiteral(1)).hasOverflowed()); \
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EXPECT_EQ(true, value.hasOverflowed()); \
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value = 10; \
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type _value = 0; \
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EXPECT_EQ(true, \
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CheckedState::DidNotOverflow == \
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(value * Checked<type, RecordOverflow>(0)).safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ(true, \
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CheckedState::DidNotOverflow == \
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(Checked<type, RecordOverflow>(0) * value).safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ(true, CheckedState::DidOverflow == \
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(value * Checked<type, RecordOverflow>( \
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std::numeric_limits<type>::max())) \
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.safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ( \
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true, \
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CheckedState::DidOverflow == \
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(Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * \
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value) \
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.safeGet(_value)); \
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value = 0; \
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_value = 0; \
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EXPECT_EQ(true, CheckedState::DidNotOverflow == \
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(value * Checked<type, RecordOverflow>( \
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std::numeric_limits<type>::max())) \
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.safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ( \
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true, \
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CheckedState::DidNotOverflow == \
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(Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * \
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value) \
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.safeGet(_value)); \
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value = 1; \
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_value = 0; \
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EXPECT_EQ(true, CheckedState::DidNotOverflow == \
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(value * Checked<type, RecordOverflow>( \
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std::numeric_limits<type>::max())) \
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.safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ( \
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true, \
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CheckedState::DidNotOverflow == \
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(Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * \
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value) \
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.safeGet(_value)); \
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_value = 0; \
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value = 0; \
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EXPECT_EQ(true, CheckedState::DidNotOverflow == \
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(value * Checked<type, RecordOverflow>( \
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std::numeric_limits<type>::max())) \
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.safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ( \
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true, \
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CheckedState::DidNotOverflow == \
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(Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * \
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(type)0) \
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.safeGet(_value)); \
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_value = 0; \
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value = 1; \
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EXPECT_EQ(true, CheckedState::DidNotOverflow == \
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(value * Checked<type, RecordOverflow>( \
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std::numeric_limits<type>::max())) \
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.safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ( \
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true, \
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CheckedState::DidNotOverflow == \
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(Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * \
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(type)1) \
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.safeGet(_value)); \
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_value = 0; \
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value = 2; \
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EXPECT_EQ(true, CheckedState::DidOverflow == \
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(value * Checked<type, RecordOverflow>( \
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std::numeric_limits<type>::max())) \
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.safeGet(_value)); \
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_value = 0; \
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EXPECT_EQ( \
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true, \
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CheckedState::DidOverflow == \
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(Checked<type, RecordOverflow>(std::numeric_limits<type>::max()) * \
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(type)2) \
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.safeGet(_value)); \
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value = 10; \
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EXPECT_EQ(true, (value * Checked<type, RecordOverflow>( \
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std::numeric_limits<type>::max())) \
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.hasOverflowed()); \
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MixedSignednessTest( \
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EXPECT_EQ(coerceLiteral(0), (value + -10).unsafeGet())); \
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MixedSignednessTest(EXPECT_EQ(0U, (value - 10U).unsafeGet())); \
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MixedSignednessTest( \
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EXPECT_EQ(coerceLiteral(0), (-10 + value).unsafeGet())); \
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MixedSignednessTest(EXPECT_EQ(0U, (10U - value).unsafeGet())); \
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value = std::numeric_limits<type>::min(); \
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MixedSignednessTest(EXPECT_EQ( \
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true, (Checked<type, RecordOverflow>(value - 1)).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, !(value--).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, value.hasOverflowed())); \
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value = std::numeric_limits<type>::max(); \
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MixedSignednessTest(EXPECT_EQ(true, !value.hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ( \
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true, (Checked<type, RecordOverflow>(value + 1)).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, !(value++).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, value.hasOverflowed())); \
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value = std::numeric_limits<type>::max(); \
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MixedSignednessTest(EXPECT_EQ(true, (value += 1).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, value.hasOverflowed())); \
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value = std::numeric_limits<type>::min(); \
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MixedSignednessTest(EXPECT_EQ(true, (value - 1U).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, !(value--).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, value.hasOverflowed())); \
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value = std::numeric_limits<type>::max(); \
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MixedSignednessTest(EXPECT_EQ(true, !value.hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ( \
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true, (Checked<type, RecordOverflow>(value + 1U)).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, !(value++).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, value.hasOverflowed())); \
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value = std::numeric_limits<type>::max(); \
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MixedSignednessTest(EXPECT_EQ(true, (value += 1U).hasOverflowed())); \
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MixedSignednessTest(EXPECT_EQ(true, value.hasOverflowed())); \
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}
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#define CoerceLiteralToUnsigned(x) x##U
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#define CoerceLiteralNop(x) x
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#define AllowMixedSignednessTest(x) x
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#define IgnoreMixedSignednessTest(x)
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CheckedArithmeticTest(int8_t, CoerceLiteralNop, IgnoreMixedSignednessTest)
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CheckedArithmeticTest(int16_t, CoerceLiteralNop, IgnoreMixedSignednessTest)
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CheckedArithmeticTest(int32_t,
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CoerceLiteralNop,
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AllowMixedSignednessTest)
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CheckedArithmeticTest(uint32_t,
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CoerceLiteralToUnsigned,
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AllowMixedSignednessTest)
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CheckedArithmeticTest(int64_t,
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CoerceLiteralNop,
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IgnoreMixedSignednessTest)
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CheckedArithmeticTest(uint64_t,
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CoerceLiteralToUnsigned,
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IgnoreMixedSignednessTest)
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} // namespace
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